id:A119127 - OEIS Search Results

Search: id:A119127

Displaying 1-1 of 1 results found.

page 1

Numbers n such that the n-th triangular number contains only digits {1,4,7}.

+0
3

1, 18, 38, 58, 15306, 28893, 3851686, 595216169886, 53248694146381 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Next entry must be greater than 1.4*10^16.`
	LINKS	`G. Resta, Tridigital Triangular Numbers`
	CROSSREFS	`Cf. A000217, A079654. See A119034 for a table of cross-references.` `Adjacent sequences: A119124 A119125 A119126 this_sequence A119128 A119129 A119130` `Sequence in context: A041644 A041646 A114698 this_sequence A084585 A132761 A079862`
	KEYWORD	`nonn,base,more`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), May 10 2006`

page 1

Search completed in 0.002 seconds

Last modified October 13 17:46 EDT 2008. Contains 145008 sequences.